Identify the correct statements:
(a) Sound waves and ultrasonic waves are longitudinal mechanical waves.
(b) Sound waves are longitudinal mechanical waves and electromagnetic waves are transverse mechanical waves.
(c) Sound waves are longitudinal mechanical waves and ultrasonic waves are transverse mechanical waves.
(d) Electromagnetic waves are transverse waves.
1
(a), (b) only
2
(a), (b), (c) only
3
(a), (d) only
4
(a) only